mirror of
https://github.com/placeAtlas/atlas.git
synced 2024-05-15 10:52:11 +02:00
388 lines
9.4 KiB
JavaScript
388 lines
9.4 KiB
JavaScript
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/*
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========================================================================
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The /r/place Atlas
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An Atlas of Reddit's /r/place, with information to each
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artwork of the canvas provided by the community.
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Copyright (C) 2017 Roland Rytz <roland@draemm.li>
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Licensed under the GNU Affero General Public License Version 3
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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For more information, see:
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https://draemm.li/various/place-atlas/license.txt
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========================================================================
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*/
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function initDraw(){
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var finishButton = document.getElementById("finishButton");
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var resetButton = document.getElementById("resetButton");
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var undoButton = document.getElementById("undoButton");
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var redoButton = document.getElementById("redoButton");
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var highlightUnchartedLabel = document.getElementById("highlightUnchartedLabel");
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var objectInfoBox = document.getElementById("objectInfo");
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var hintText = document.getElementById("hint");
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var exportButton = document.getElementById("exportButton");
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var cancelButton = document.getElementById("cancelButton");
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var exportOverlay = document.getElementById("exportOverlay");
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var exportCloseButton = document.getElementById("exportCloseButton");
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var rShiftPressed = false;
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var lShiftPressed = false;
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var shiftPressed = false;
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var backgroundCanvas = document.createElement("canvas");
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backgroundCanvas.width = 1000;
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backgroundCanvas.height = 1000;
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var backgroundContext = backgroundCanvas.getContext("2d");
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var highlightUncharted = true;
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renderBackground();
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container.style.cursor = "crosshair";
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var path = [];
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var drawing = true;
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var undoHistory = [];
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var lastPos = [0, 0];
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render(path);
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container.addEventListener("mousedown", function(e){
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lastPos = [
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e.clientX
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,e.clientY
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];
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});
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function getCanvasCoords(x, y){
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x = x - container.offsetLeft;
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y = y - container.offsetTop;
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var pos = [
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~~((x - (container.clientWidth/2 - innerContainer.clientWidth/2 + zoomOrigin[0]))/zoom)+0.5
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,~~((y - (container.clientHeight/2 - innerContainer.clientHeight/2 + zoomOrigin[1]))/zoom)+0.5
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];
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if(shiftPressed && path.length > 0){
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var previous = path[path.length-1];
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if(Math.abs(pos[1] - previous[1]) > Math.abs(pos[0] - previous[0]) ){
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pos[0] = previous[0];
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} else {
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pos[1] = previous[1];
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}
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}
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return pos;
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}
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container.addEventListener("mouseup", function(e){
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if(Math.abs(lastPos[0] - e.clientX) + Math.abs(lastPos[1] - e.clientY) <= 4 && drawing){
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var coords = getCanvasCoords(e.clientX, e.clientY);
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path.push(coords);
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render(path);
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undoHistory = [];
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redoButton.disabled = true;
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undoButton.disabled = false;
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if(path.length >= 3){
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finishButton.disabled = false;
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}
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}
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});
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window.addEventListener("mousemove", function(e){
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if(!dragging && drawing && path.length > 0){
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var coords = getCanvasCoords(e.clientX, e.clientY);
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render(path.concat([coords]));
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}
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});
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window.addEventListener("keyup", function(e){
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if(e.key == "Enter"){
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finish();
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} else if(e.key == "z" && e.ctrlKey){
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undo();
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} else if(e.key == "y" && e.ctrlKey){
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redo();
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} else if(e.key == "Escape"){
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exportOverlay.style.display = "none";
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} else if (e.key === "Shift" ){
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if(e.code === "ShiftRight"){
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rShiftPressed = false;
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} else if(e.code === "ShiftLeft"){
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lShiftPressed = false;
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}
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shiftPressed = rShiftPressed || lShiftPressed;
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}
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});
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window.addEventListener("keydown", function(e){
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if (e.key === "Shift" ){
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if(e.code === "ShiftRight"){
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rShiftPressed = true;
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} else if(e.code === "ShiftLeft"){
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lShiftPressed = true;
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}
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shiftPressed = rShiftPressed || lShiftPressed;
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}
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});
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finishButton.addEventListener("click", function(e){
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finish();
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});
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undoButton.addEventListener("click", function(e){
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undo();
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});
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redoButton.addEventListener("click", function(e){
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redo();
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});
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resetButton.addEventListener("click", function(e){
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reset();
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});
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cancelButton.addEventListener("click", function(e){
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reset();
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});
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document.getElementById("nameField").addEventListener("keyup", function(e){
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if(e.key == "Enter"){
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exportJson();
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}
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});
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document.getElementById("websiteField").addEventListener("keyup", function(e){
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if(e.key == "Enter"){
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exportJson();
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}
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});
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document.getElementById("subredditField").addEventListener("keyup", function(e){
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if(e.key == "Enter"){
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exportJson();
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}
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});
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exportButton.addEventListener("click", function(e){
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exportJson();
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});
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exportCloseButton.addEventListener("click", function(e){
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reset();
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exportOverlay.style.display = "none";
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});
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document.getElementById("highlightUncharted").addEventListener("click", function(e){
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highlightUncharted = this.checked;
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render(path);
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});
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function exportJson(){
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var exportObject = {
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id: 0
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,name: document.getElementById("nameField").value
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,description: document.getElementById("descriptionField").value
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,website: document.getElementById("websiteField").value
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,subreddit: document.getElementById("subredditField").value
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,center: calculateCenter(path)
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,path: path
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};
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var jsonString = JSON.stringify(exportObject, null, "\t");
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var textarea = document.getElementById("exportString");
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jsonString = jsonString.split("\n");
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jsonString = jsonString.join("\n ");
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jsonString = " "+jsonString;
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textarea.value = jsonString;
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exportOverlay.style.display = "flex";
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textarea.focus();
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textarea.select();
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}
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function calculateCenter(path){
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var area = 0,
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i,
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j,
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point1,
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point2;
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for (i = 0, j = path.length - 1; i < path.length; j=i,i++) {
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point1 = path[i];
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point2 = path[j];
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area += point1[0] * point2[1];
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area -= point1[1] * point2[0];
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}
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area *= 3;
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var x = 0,
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y = 0,
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f;
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for (i = 0, j = path.length - 1; i < path.length; j=i,i++) {
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point1 = path[i];
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point2 = path[j];
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f = point1[0] * point2[1] - point2[0] * point1[1];
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x += (point1[0] + point2[0]) * f;
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y += (point1[1] + point2[1]) * f;
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}
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return [~~(x / area)+0.5, ~~(y / area)+0.5];
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}
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function undo(){
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if(path.length > 0 && drawing){
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undoHistory.push(path.pop());
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redoButton.disabled = false;
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if(path.length == 0){
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undoButton.disabled = true;
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}
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render(path);
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}
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}
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function redo(){
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if(undoHistory.length > 0 && drawing){
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path.push(undoHistory.pop());
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undoButton.disabled = false;
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if(undoHistory.length == 0){
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redoButton.disabled = true;
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}
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render(path);
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}
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}
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function finish(){
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drawing = false;
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render(path);
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objectInfoBox.style.display = "block";
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hintText.style.display = "none";
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finishButton.style.display = "none";
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undoButton.style.display = "none";
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redoButton.style.display = "none";
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resetButton.style.display = "none";
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highlightUnchartedLabel.style.display = "none";
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document.getElementById("nameField").focus();
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}
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function reset(){
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path = [];
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undoHistory = [];
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finishButton.disabled = true;
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undoButton.disabled = true; // Maybe make it undo the cancel action in the future
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redoButton.disabled = true;
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drawing = true;
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render(path);
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objectInfoBox.style.display = "none";
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hintText.style.display = "block";
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finishButton.style.display = "block";
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undoButton.style.display = "block";
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redoButton.style.display = "block";
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resetButton.style.display = "block";
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highlightUnchartedLabel.style.display = "block";
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document.getElementById("nameField").value = "";
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document.getElementById("descriptionField").value = "";
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document.getElementById("websiteField").value = "";
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document.getElementById("subredditField").value = "";
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}
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function renderBackground(){
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backgroundContext.clearRect(0, 0, canvas.width, canvas.height);
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backgroundContext.fillStyle = "rgba(0, 0, 0, 1)";
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//backgroundContext.fillRect(0, 0, canvas.width, canvas.height);
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for(var i = 0; i < atlas.length; i++){
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var path = atlas[i].path;
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backgroundContext.beginPath();
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if(path[0]){
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backgroundContext.moveTo(path[0][0], path[0][1]);
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}
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for(var p = 1; p < path.length; p++){
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backgroundContext.lineTo(path[p][0], path[p][1]);
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}
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backgroundContext.closePath();
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backgroundContext.fill();
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}
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}
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function render(path){
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context.globalCompositeOperation = "source-over";
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context.clearRect(0, 0, canvas.width, canvas.height);
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if(highlightUncharted){
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context.drawImage(backgroundCanvas, 0, 0);
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context.fillStyle = "rgba(0, 0, 0, 0.4)";
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} else {
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context.fillStyle = "rgba(0, 0, 0, 0.6)";
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}
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context.fillRect(0, 0, canvas.width, canvas.height);
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context.beginPath();
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if(path[0]){
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context.moveTo(path[0][0], path[0][1]);
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}
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for(var i = 1; i < path.length; i++){
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context.lineTo(path[i][0], path[i][1]);
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}
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context.closePath();
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context.strokeStyle = "rgba(255, 255, 255, 1)";
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context.stroke();
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context.globalCompositeOperation = "destination-out";
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context.fillStyle = "rgba(0, 0, 0, 1)";
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context.fill();
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}
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}
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